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Cheap flights from Ontario to the United States from $31

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to the United States departing on 11/26. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Ontario to the United States

Cheap round-trip flights

These are some of the best round-trip flight deals from Ontario to the United States that have been recently found on momondo from popular airlines, departing in the coming months.

Cheap one-way flights

Flying one-way? These are some of the best deals recently discovered on momondo for flights from Ontario to the United States.

Cheap last minute flights

Planning a quick getaway from Ontario to the United States? These are the last-minute flight deals available now.

Cheap direct flights

If you prefer a non-stop journey, check out our latest direct flight deals to the United States, so you can enjoy a seamless trip without layovers.

Cheap bus & train deals from Ontario to the United States

Find recent round-trip train or bus tickets from Ontario to the United States.

All round-trip flight deals to the United States

The cheapest plane tickets to the United States found on KAYAK recently.
12:53 pm - 1:59 pmONT-LAS
1h 06mnonstop
2:17 pm - 3:26 pmLAS-ONT
1h 09mnonstop
$38Frontier
Find Deal
Tue, Dec 17 - Thu, Dec 19
11:46 am - 12:55 pmONT-LAS
1h 09mnonstop
10:36 am - 11:44 amLAS-ONT
1h 08mnonstop
$41Frontier
Find Deal
Mon, Dec 9 - Wed, Dec 11
8:52 pm - 11:44 pmONT-SEA
2h 52mnonstop
9:56 am - 12:33 pmSEA-ONT
2h 37mnonstop
$137Alaska Airlines
Find Deal
Wed, Dec 18 - Sat, Jan 4
6:00 am - 8:53 amONT-SEA
2h 53mnonstop
5:28 pm - 8:00 pmSEA-ONT
2h 32mnonstop
$147Alaska Airlines
Find Deal
Tue, Dec 10 - Tue, Dec 10
6:00 am - 8:55 amONT-SEA
2h 55mnonstop
12:40 pm - 3:25 pmSEA-ONT
2h 45mnonstop
$157Delta
Find Deal
Wed, Jan 8 - Sun, Jan 12
6:00 am - 7:26 amONT-SFO
1h 26mnonstop
9:27 pm - 11:00 pmSFO-ONT
1h 33mnonstop
$173United Airlines
Find Deal
Sat, Dec 14 - Tue, Dec 31
4:05 pm - 7:00 pmONT-SEA
2h 55mnonstop
7:45 pm - 10:32 pmSEA-ONT
2h 47mnonstop
$177Delta
Find Deal
Thu, Jan 9 - Mon, Jan 13
10:47 am - 12:20 pmONT-SFO
1h 33mnonstop
4:35 pm - 6:04 pmSFO-ONT
1h 29mnonstop
$179United Airlines
Find Deal
Tue, Jan 7 - Tue, Jan 14
2:44 pm - 7:44 pmONT-DFW
3h 00mnonstop
12:22 pm - 1:51 pmDFW-ONT
3h 29mnonstop
$194American Airlines
Find Deal
Fri, Jan 10 - Tue, Jan 14
10:00 am - 3:19 pmONT-DEN
4h 19m1 stop
2:26 pm - 6:26 pmDEN-ONT
5h 00m1 stop
$200American Airlines
Find Deal
Wed, Feb 12 - Sat, Feb 15
10:40 pm - 11:55 pmONT-LAS
1h 15mnonstop
$31Frontier
Find Deal
Tue, Nov 26
10:31 pm - 11:51 pmONT-LAS
1h 20mnonstop
$32Frontier
Find Deal
Sun, Dec 22
8:52 pm - 11:44 pmONT-SEA
2h 52mnonstop
$69Alaska Airlines
Find Deal
Wed, Dec 18
11:14 am - 4:00 pmONT-SEA
4h 46m1 stop
$78Alaska Airlines
Find Deal
Tue, Jan 14
1:43 pm - 5:02 pmONT-DEN
2h 19mnonstop
$79United Airlines
Find Deal
Tue, Jan 7
10:47 am - 3:45 pmONT-SEA
4h 58m1 stop
$88United Airlines
Find Deal
Tue, Jan 21
6:10 am - 11:23 amONT-LAS
5h 13m1 stop
$99American Airlines
Find Deal
Tue, Dec 17
10:05 am - 4:13 pmONT-SFO
6h 08m1 stop
$99American Airlines
Find Deal
Tue, Feb 18
1:05 pm - 7:14 pmONT-DEN
5h 09m1 stop
$108Delta
Find Deal
Tue, Dec 31
5:50 am - 8:55 amONT-SEA
3h 05mnonstop
$114Delta
Find Deal
Fri, Dec 13
10:05 pm - 11:20 pmONT-LAS
1h 15mnonstop
6:00 am - 7:08 amLAS-ONT
1h 08mnonstop
$87Frontier
Find Deal
Mon, Nov 25 - Thu, Nov 28
4:07 pm - 5:33 pmONT-SFO
1h 26mnonstop
1:43 pm - 3:05 pmSFO-ONT
1h 22mnonstop
$87Frontier
Find Deal
Sun, Nov 24 - Mon, Nov 25
6:28 pm - 4:23 pmONT-DEN
20h 55m2 stops
7:20 pm - 8:44 pmDEN-ONT
2h 24mnonstop
$318United Airlines
Find Deal
Sat, Nov 23 - Sun, Nov 24
8:58 pm - 11:44 pmONT-SEA
2h 46mnonstop
2:48 pm - 5:21 pmSEA-ONT
2h 33mnonstop
$347Alaska Airlines
Find Deal
Fri, Nov 22 - Tue, Dec 10
10:00 am - 12:51 pmONT-SEA
2h 51mnonstop
10:25 am - 12:58 pmSEA-ONT
2h 33mnonstop
$352Alaska Airlines
Find Deal
Tue, Nov 26 - Tue, Dec 3
12:53 pm - 7:05 pmONT-SFO
6h 12m1 stop
5:40 am - 12:03 pmSFO-ONT
6h 23m1 stop
$378American Airlines
Find Deal
Fri, Nov 22 - Sun, Nov 24
1:55 pm - 9:07 pmONT-SEA
7h 12m1 stop
5:15 am - 9:53 amSEA-ONT
4h 38m1 stop
$401United Airlines
Find Deal
Sun, Nov 24 - Sun, Dec 15
11:53 am - 12:53 amONT-JFK
10h 00m1 stop
7:00 am - 4:45 pmJFK-ONT
12h 45m1 stop
$420Delta
Find Deal
Fri, Nov 22 - Tue, Nov 26
6:10 am - 12:38 pmONT-LAS
6h 28m1 stop
4:28 pm - 10:02 pmLAS-ONT
5h 34m1 stop
$428American Airlines
Find Deal
Fri, Nov 22 - Sat, Dec 28
11:53 am - 12:28 amONT-EWR
9h 35m1 stop
7:10 am - 12:11 pmEWR-ONT
8h 01m1 stop
$442Delta
Find Deal
Sat, Nov 23 - Wed, Nov 27
10:05 pm - 11:20 pmONT-LAS
1h 15mnonstop
1:56 pm - 3:06 pmLAS-ONT
1h 10mnonstop
$47Frontier
Find Deal
Mon, Dec 2 - Sat, Dec 7
10:39 pm - 11:59 pmONT-LAS
1h 20mnonstop
2:17 pm - 3:26 pmLAS-ONT
1h 09mnonstop
$48Frontier
Find Deal
Tue, Dec 24 - Thu, Dec 26
10:47 am - 12:20 pmONT-SFO
1h 33mnonstop
8:25 am - 9:51 amSFO-ONT
1h 26mnonstop
$119United Airlines
Find Deal
Sat, Feb 1 - Tue, Feb 4
6:00 am - 8:53 amONT-SEA
2h 53mnonstop
8:00 am - 10:38 amSEA-ONT
2h 38mnonstop
$137Alaska Airlines
Find Deal
Tue, Dec 17 - Wed, Jan 8
6:00 am - 8:54 amONT-SEA
2h 54mnonstop
8:00 am - 10:49 amSEA-ONT
2h 49mnonstop
$147Alaska Airlines
Find Deal
Tue, Jan 7 - Sat, Jan 11
6:00 am - 8:55 amONT-SEA
2h 55mnonstop
12:40 pm - 3:25 pmSEA-ONT
2h 45mnonstop
$157Delta
Find Deal
Wed, Jan 8 - Sun, Jan 12
2:44 pm - 7:44 pmONT-DFW
3h 00mnonstop
12:22 pm - 1:51 pmDFW-ONT
3h 29mnonstop
$169American Airlines
Find Deal
Sat, Jan 11 - Sat, Feb 8
6:00 am - 7:26 amONT-SFO
1h 26mnonstop
9:27 pm - 11:00 pmSFO-ONT
1h 33mnonstop
$173United Airlines
Find Deal
Sat, Dec 14 - Tue, Dec 31
6:00 am - 8:55 amONT-SEA
2h 55mnonstop
12:40 pm - 3:25 pmSEA-ONT
2h 45mnonstop
$177Delta
Find Deal
Thu, Jan 9 - Mon, Jan 13
2:44 pm - 7:44 pmONT-DFW
3h 00mnonstop
12:22 pm - 1:51 pmDFW-ONT
3h 29mnonstop
$194American Airlines
Find Deal
Fri, Jan 10 - Tue, Jan 14

Frontier flights from Ontario to United States

Our best Frontier deals on Ontario to United States flight tickets
Frontier
Dec 17
ONT12:53 pmOntario
1h 06m
LAS1:59 pmLas Vegas Harry Reid Intl
Dec 19
LAS2:17 pmLas Vegas Harry Reid Intl
1h 09m
ONT3:26 pmOntario
Frontier
Dec 9
ONT11:46 amOntario
1h 09m
LAS12:55 pmLas Vegas Harry Reid Intl
Dec 11
LAS10:36 amLas Vegas Harry Reid Intl
1h 08m
ONT11:44 amOntario
Frontier
Dec 11
ONT12:34 pmOntario
1h 06m
LAS1:40 pmLas Vegas Harry Reid Intl
Dec 18
LAS11:30 amLas Vegas Harry Reid Intl
1h 09m
ONT12:39 pmOntario

United Airlines flights from Ontario to United States

Our best United Airlines deals on Ontario to United States flight tickets
United Airlines
Dec 14
ONT6:00 amOntario
1h 26m
SFO7:26 amSan Francisco
Dec 31
SFO9:27 pmSan Francisco
1h 33m
ONT11:00 pmOntario
United Airlines
Jan 7
ONT10:47 amOntario
1h 33m
SFO12:20 pmSan Francisco
Jan 14
SFO4:35 pmSan Francisco
1h 29m
ONT6:04 pmOntario
United Airlines
Dec 16
ONT6:00 amOntario
1h 26m
SFO7:26 amSan Francisco
Dec 31
SFO9:27 pmSan Francisco
1h 33m
ONT11:00 pmOntario

See travel insights to the United States from

How to get the cheapest flight ticket from Ontario to United States

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest day to depart on your flight to United States?

According to our data, Tuesday is the cheapest day to fly to United States from Ontario. The lowest ticket price found for a Tuesday departure recently was $343. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. If your travel schedule is flexible, try to avoid departing on a Thursday because tickets tend to average around $392. These prices are subject to change though, so be sure to set up a Price Alert for flights to United States.

What is the cheapest Ontario to United States flight route?

Fly from Ontario to Las Vegas Harry Reid Intl for the best Ontario - United States flight prices

What cabin class options are available on Ontario to United States flights?

There are 4 cabin classes available to choose from on Ontario to United States flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Ontario to United States flights?

You could potentially save up to 183% on your flight if you consider stops on a Ontario to United States flight.

Cheap Ontario to United States flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Ontario to United States

Best Price Found

$31

Fastest flight time

1h 01m

Direct flights

Every day

Airports in United States

5 airports
The best one-way flight to United States from Ontario in the past 72 hours is $31. The best round-trip flight deal from Ontario to United States found on momondo in the last 72 hours is $38.
The fastest flight from Ontario to United States takes 1h 01m
Direct flights go from Ontario to United States every day.
There are 5 airports near United States: Dallas/Fort Worth (DFW), Denver Intl (DEN), San Francisco (SFO), Seattle/Tacoma Intl (SEA), Las Vegas Harry Reid Intl (LAS)

  • When did momondo last update prices for flights from Ontario Airport to United States?

    Prices for flights from Ontario Airport to United States refresh daily.

  • How many operators does momondo search for flights from Ontario Airport to United States?

  • How old do you have to be to fly from Ontario Airport to United States?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Ontario Airport to United States.

  • What documentation or ID do you need to fly to United States?

    The necessary travel and health documents for your United States trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from Ontario to United States?


Best airlines flying from Ontario to United States

Compare and see reviews for airlines that fly from Ontario to United States with momondo
Airline
Rating
Free Cancellation
Price
Spirit AirlinesPriceFrom $36Free CancellationRating
6.3
8,169 reviews
Search Spirit Airlines flights
FrontierPriceFrom $38Free CancellationRating
6.1
3,536 reviews
Search Frontier flights
Alaska AirlinesPriceFrom $38Free CancellationRating
8.0
9,464 reviews
Search Alaska Airlines flights
DeltaPriceFrom $55Free CancellationRating
8.0
8,755 reviews
Search Delta flights
Breeze AirwaysPriceFrom $78Free CancellationRating
8.2
123 reviews
Search Breeze Airways flights
JetBluePriceFrom $78Free CancellationRating
7.4
3,389 reviews
Search JetBlue flights
Ravn AlaskaPriceFrom $86Free CancellationRating
8.4
12 reviews
Search Ravn Alaska flights
United AirlinesPriceFrom $134Free CancellationRating
7.4
9,172 reviews
Search United Airlines flights
SouthwestPriceFrom $176Free CancellationRating
8.1
5,005 reviews
Search Southwest flights
American AirlinesPriceFrom $189Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Ontario to United States?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Ontario to United States for you.

Can I find flights from Ontario to United States with flexible booking policies on momondo?

Yes. All flights to United States from Ontario on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Ontario to United States?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to United States from Ontario.

I’m not ready to book a flight from Ontario to United States right now. Can momondo alert me if prices change?

If you are simply researching potential flights to United States, momondo offers a useful price alert feature which will track prices for flights to United States from Ontario and alert you when they change.


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